Room temperature curable organopolysiloxane compositions

1 . A room temperature curable organopolysiloxane composition comprising

(A) 100 parts by weight of at least one organopolysiloxane selected from the group consisting of an organopolysiloxane having the general formula (1):

HO(R 1 2 SiO) x H   (1)

wherein R 1 is each independently a substituted or unsubstituted monovalent hydrocarbon group and x is an integer of at least 10, an organopolysiloxane having the general formula (2):

wherein R 1 and x are as defined above, Me is methyl, Y is an oxygen atom or an alkylene group of 1 to 5 carbon atoms, and n is independently an integer of 0 or 1, and an organopolysiloxane having the general formula (3):

wherein R 1 , Me, Y and n are as defined above, R 2 is a branch chain containing a hydrolyzable group having the general formula (4):

—Y—Si(OMe) 3-n   (4)

wherein Y, Me and n are as defined above, x′ is an integer of at least 9, z is an integer of at least 1, and x′+z=x,

(B) 0.1 to 20 parts by weight of an alkoxysilane compound having on the average at least two silicon-bonded hydrolyzable groups per molecule or a partial hydrolyzate thereof or a mixture thereof,

(C) 0.5 to 15 parts by weight of an organoxy titanium having the general formula (5):

Ti(OR 3 ) 4   (5)

wherein R 3 is each independently a monovalent hydrocarbon group of 2 to 10 carbon atoms,

(D) 0.01 to 10 parts by weight of an organic compound having at least one hydroxyl group bonded to a benzene ring per molecule, and

(E) 0 to 10 parts by weight of a silane coupling agent,

wherein the color of the composition tinted with components (C) and (D) fades or changes upon curing of the composition, by which a degree of curing is visually observable.

2 . The composition of claim 1 , wherein component (D) is a phenol, cresol or hydroquinone.

3 . The composition of claim 1 , further comprising (F) 1 to 500 parts by weight of at least one filler.

4 . The composition of claim 1 , further comprising (G) an inert silicone fluid.